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Ramesh, S.L., Sunder Raju, P.V., Anjaiah, K.V., Ramavathi, M., Gnaneswara, R., Dasaram, B., Nirmal Charan, S., Suba Rao, D.V., Sarma, D.S., Ram Mohan, M. and Balaram, V. (2001) Determination of Gold in Rocks, Ores, and Other Geological Materials by Atomic Absorption Techniques. Atomic Spectroscopy, 22, 263-269.

has been cited by the following article:

• TITLE: The Application of Flame Atomic Absorption Spectrometry for Gold Determination in Some of Its Bearing Rocks

  AUTHORS: Hisham K. Fouad, Randa M. Elrakaiby, Mohamed D. Hashim

  KEYWORDS: Gold, Determination, MIBK, Extraction, FAAS

  JOURNAL NAME: American Journal of Analytical Chemistry, Vol.6 No.5, March 31, 2015

  ABSTRACT: A developed method was designed for gold determination directly in organic medium in some sedimentary rocks (fine sandstone, carbonates), pyrite, serpentine and international standard gold sample (MA-1a) using flame atomic absorption spectroscopy (FAAS). Instrumental parameters; burner angle, fuel flow rate, band pass and burner height together with chemical parameters; different media, leaching and interference effect were optimized to improve gold determination. Selective leaching using a new mixture (5% KCN, 5% Na2S2O3 and hydrogen peroxide) offered maximum leaching percentage of gold (>99%) with minimal concentration of accompanying elements. Extraction parameters using methyl isobutyl ketone (MIBK) from 3 M HCl were optimized for more than 99% gold extraction, followed by scrubbing using 0.1 M HCl. Gold was determined directly in organic phase. Beer’s law was obeyed from 0.01 μg/ml to 10 μg/ml. Standard deviation (from 0.017 to 1.05) and percentage error (from 1.5% to 2.5%) using the present developed AAS method were calculated.